: impossible to imagine or believe : not conceivable
It's inconceivable (to me) that anyone could have survived such a violent crash.
The fire caused an inconceivable amount of damage.
After coming this far, to quit now would be inconceivable.
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“Inconceivable.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/inconceivable. Accessed 15 Jun. 2026.
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